{
  "id": "page:docs-harness-features-backlog-gaps-performance-gap-perf-004",
  "_kind": "Page",
  "_file": "wiki/docs/harness-features-backlog/gaps/performance/gap-perf-004.md",
  "_cluster": "wiki",
  "attributes": {
    "nodeKind": "Page",
    "sourcePath": "docs/harness-features-backlog/gaps/performance/GAP-PERF-004.md",
    "sourceKind": "repo-docs",
    "title": "GAP-PERF-004: Streaming Message Rendering",
    "displayName": "GAP-PERF-004: Streaming Message Rendering",
    "slug": "docs/harness-features-backlog/gaps/performance/gap-perf-004",
    "articlePath": "wiki/docs/harness-features-backlog/gaps/performance/GAP-PERF-004.md",
    "article": "\n# GAP-PERF-004: Streaming Message Rendering\n\n| Field | Value |\n|-------|-------|\n| Category | performance |\n| Priority | High |\n| Effort | L |\n| Status | Missing |\n\n## Description\nStream output from harness invocations in real-time during effect execution instead of waiting for completion, enabling live progress visibility.\n\n## Current State\n`invokeHarness()` waits for the child process to complete before returning results. No embedded SDK dashboard exists yet for real-time model output.\n\n## Target State\nHarness invocation output streams in real-time. Pi adapter leverages `PiSessionHandle.subscribe()` for event streaming. CLI harnesses stream stdout from child processes. Embedded SDK dashboard shows live output.\n\n## Dependencies\n- [GAP-SUBOBS-001](../subagent-observability/GAP-SUBOBS-001.md) -- streaming capture from invoked harnesses\n\n## Key Files\n| Component | Path |\n|-----------|------|\n| Harness invoker | `packages/sdk/src/harness/invoker.ts` |\n| Pi session wrapper | `packages/sdk/src/harness/piWrapper.ts` |\n| Embedded SDK dashboard (new) | `packages/sdk/src/dashboard/` |\n\n## Recommendation\nPhase 2 implementation. For Pi adapter, leverage `PiSessionHandle.subscribe()`. For CLI harnesses, pipe stdout/stderr from child processes in real-time.\n",
    "documents": []
  },
  "outgoingEdges": [],
  "incomingEdges": [
    {
      "from": "page:docs-harness-features-backlog",
      "to": "page:docs-harness-features-backlog-gaps-performance-gap-perf-004",
      "kind": "contains_page"
    }
  ]
}